I scared myself a couple of times recently, because twice in the last few days, I'd cooked on the house stove top and left a burner running. For a while.
Both times it was at the lowest setting, but hey, open flame. -_- One of the times I even left the house and walked for several blocks, the empty house with a running burner. Came back, luckily, to the house untouched.
MORE VIGILANT, Chris. You can be. May this be a lapse I don't repeat.